Senior Security Engineer

CoStar Group

Confirmed live yesterday High trust

Quick summary

Work type
On-site
Location
Arlington, VARichmond, VA
Salary
$115,000–$203,000 / yr
Posted
74 days ago
Freshness
Confirmed live yesterday

Market check

Salary context

Competitive pay

How this pay compares to similar roles

Similar $180k
This role $159k
$103k most similar roles pay here $229k

This role pays less than 66% of similar roles. Most pay $151,475–$208,800 — the shaded band above. At the midpoint, this role pays about $159k versus about $180k for comparable roles.

Based on 240 similar postings.

Employer

About CoStar Group

CoStar Group is the leading provider of commercial real estate information, analytics, and online marketplaces, including CoStar, Apartments.com, and LoopNet platforms. Industry: Commercial Real Estate Data & Analytics

CoStar Group currently has 65 open roles on FindRole.

Listed pay typically runs $133,000–$190,000 across 63 roles with salary data.

Most-posted roles

View all roles at CoStar Group

At a glance

TL;DR · Senior Security Engineer

Sr. Security Engineer joins the security team to evolve and safeguard the enterprise security posture across network infrastructure, cloud services, SaaS platforms, and emerging AI systems. This role involves designing and auditing secure network configurations for on-premise and cloud environments, managing Secure Service Edge platforms, and enforcing policies for firewalls, load balancers, and wireless infrastructure. The engineer will also manage SaaS security governance by tuning CASB tools, defining identity integration standards, and conducting risk assessments for AI platforms, copilots, and agent-based systems to prevent data leakage. Key technical requirements include experience with AWS networking, NGFWs, WAFs, and scripting in Python or PowerShell. Candidates should possess expertise in subnetting, routing, and infrastructure-as-code tools like Terraform while addressing security risks inherent in modern machine-driven workflows and complex enterprise environments.

What does a Security Engineer earn?

Median $185250 from 84 postings across 39 companies.

See salary data

What you'll do

  • Design and implement secure network configurations for both on-premise and cloud environments.
  • Audit and manage security policies for firewalls, load balancers, routers, switches, and wireless infrastructure.
  • Operate and tune SaaS security tools like CASB and SSE to detect misconfigurations and data exfiltration.
  • Define and enforce security standards for SaaS logging, identity integration, and least-privilege access.
  • Assess security risks associated with AI platforms, including prompt leakage and model access controls.
  • Design security controls for AI-assisted workflows and developer tools in collaboration with engineering teams.
  • Monitor telemetry and logs to identify anomalous behavior or misuse patterns across AI and SaaS systems.
  • Conduct threat modeling and risk assessments for AI integrations within enterprise systems.

What we're looking for

  • Bachelor's Degree from an accredited, not-for-profit, in-person university or college.
  • 5+ years of experience in Information Security or Security Engineering.
  • One or more industry-recognized certifications such as CISSP, SANS/GIAC, CCNA, or equivalent.
  • Strong experience securing AWS networking including NACLs, Security Groups, ALB/NLB, Transit Gateway, and Network Firewall.
  • Hands-on experience with NGFWs, WAFs, load balancers, and enterprise network segmentation.
  • Experience with SaaS security platforms, CASB, or SSE tooling.
  • Strong scripting or automation skills in Python, PowerShell, or similar languages.
  • Deep understanding of subnetting, routing, and network isolation principles.

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